Used for emphasis to insist that one does, has done, or has something.

What does so so mean in slang?

Also soso . indifferent; neither very good nor very bad.

Do so in a sentence?

Do so is generally more formal than do it and do that: I wanted them to leave, and politely asked them to do so, but they wouldn't go, so I called the police. (I wanted them to leave and I politely asked them to leave.)